CppCast Episode 160: Parallel Ranges with Christopher Di Bella

By robwirving | Jul 27, 2018 08:25 AM | Tags: None

Episode 160 of CppCast the first podcast for C++ developers by C++ developers. In this episode Rob and Jason are joined by Christopher Di Bella to discuss using Ranges with Parallel algorithms and much more.

CppCast Episode 160: Parallel Ranges with Christopher Di Bella

by Rob Irving and Jason Turner

About the interviewee:

Christopher Di Bella is a Staff Software Engineer for Codeplay’s ComputeCpp Runtime Technology and a C++ teacher. He advocates for including the Concepts TS and the Ranges TS in C++20.

Chris spends his days working on ComputeCpp, Codeplay’s implementation of SYCL, a Khronos Standard for heterogeneous programming in C++; the Khronos implementation for the Parallel STL (using SYCL); and researching Parallel Ranges, which is an attempt to fuse ranges together with the parallel STL.

Chris was previously a software developer for Nasdaq, and a tutor for UNSW Sydney’s advanced C++ and compiler courses. In his spare time, Chris enjoys poking at things involving Ranges, snowboarding, playing games, and watching films.

A Case for p0424 - Sane C++ Serialization -- Wojciech Szeszol

By ciechowoj | Jul 27, 2018 12:19 AM | Tags: None

Serialization was always a problematic topic in C++. Is it going to change in the future? Check out to see how the string literals as the template parameters can help here.

A Case for p0424 - Sane C++ Serialization

By Wojciech Szeszol

From the article:

Probably every C# developer knows how versatile the Newtonsoft.Json or the standard C# serialization libraries are. The serialization with DataContract or JsonProperty is easy to write, maintain and quite efficient. When we compare it with what C++ have to offer, the latter looks very poorly. We have selection of dedicated reflection/serialization libraries [...]. Unfortunately all of them come with different sets of drawbacks: they require the serialization methods to be written manually, force usage of ugly macros, require manual registration of the structures and their fields or involve additional compilation step for the schema definitions. [...] This may change with the new C++20 standard and the introduction of the string literals as the template parameters.

CLion 2018.2 released: clangd, new project models, sanitizers, and more–JetBrains

By Anastasia Kazakova | Jul 26, 2018 09:35 AM | Tags: community

CLion is becoming a more mature C/C++ IDE with the new release!

<img alt="" data-cke-saved-src="https://d3nmt5vlzunoa1.cloudfront.net/clion/files/2018/07/[email protected]" src="https://d3nmt5vlzunoa1.cloudfront.net/clion/files/2018/07/[email protected]" 230px;="" height:="" 115px;="" float:="" right;"="">

CppCon 2017: Building C++ Modules--Boris Kolpackov

By Adrien Hamelin | Jul 25, 2018 12:30 PM | Tags: experimental community

Have you registered for CppCon 2018 in September? Registration is open now.

While we wait for this year’s event, we’re featuring videos of some of the 100+ talks from CppCon 2017 for you to enjoy. Here is today’s feature:

Building C++ Modules

by Boris Kolpackov

(watch on YouTube) (watch on Channel 9)

Summary of the talk:

C++ Modules TS is now implemented (to various degrees) by GCC, Clang, and MSVC. The aim of this talk is to provide practical information on the mechanics of creating and consuming modules with these compilers. It is based on our experience adding modules support to the build2 toolchain and then modularizing some of its components.

We start with a brief introduction to C++ modules, why we need them, and how they relate to other physical design mechanisms, namely headers, namespaces, and libraries.

Next we explore the kind of integration modules will require from a C++ build system. Specifically, when and where a module binary interface is built? How can a build system discover which modules are needed? What are the implications for parallel and distributed builds? Can we finally get rid of the preprocessor? And what happens to header-only libraries in this brave new modularized world?

With a firm understanding of the implications C++ modules have on the build process, we can try to answer some of the module design questions: What is an appropriate module granularity? Should we have separate module interface and implementation units? Can we have a dual header/module interface for legacy support? Are module-only libraries to become all the rage?

C++/CLI support comes to ReSharper C++

By Anastasia Kazakova | Jul 25, 2018 12:09 PM | Tags: None

Two big worlds of C++ and C# are bridged by the interop language, C++/CLI, and now it's supported in ReSharper C++, a Visual Studio extension from JetBrains.

C++/CLI support comes to ReSharper C++

by Phil Nash

From the article:

While C# is a highly productive language, and is no slouch when it comes to performance, there are many reasons that we may also have a parts of our project written in pure C++. C++/CLI is an answer to the question, “how do I get to, or from, my pure C++ from C# (or any .NET language)?”. If you just need to call into C++, and it exposes a C API, P/Invoke may be the simplest way to go. But for more complex cases – where you want to model richer types and class hierarchies – C++/CLI let’s you do that.

Performance of std::string_view vs std::string from C++17--Bartlomiej Filipek

By Adrien Hamelin | Jul 25, 2018 12:08 PM | Tags: performance c++17

The usefullness of views.

Performance of std::string_view vs std::string from C++17

by Bartlomiej Filipek

From the article:

How much is std::string_view faster than standard std::string operations?

Have a look at a few examples where I compare std::string_view against std::string.

PVS-Studio as SAST solution

By Andrey Karpov | Jul 25, 2018 02:19 AM | Tags: vulnerabilities sei cert security weaknesses sast devsecops cwe cve

PVS-Studio is a static application security testing tool (SAST). In other words, the PVS-Studio analyzer detects not only typos, dead code and other errors, but also security weaknesses (potential vulnerabilities).

PVS-Studio as SAST solution

by Andrey Karpov

From the article:

Until recently, in our articles we have positioned PVS-Studio as a tool for detecting errors in code. While we almost never regarded PVS-Studio in a security context. We will try to remedy this situation and take a look at the tool in terms of testing of security applications and DevSecOps practices.

For the convenience of specialists who will use PVS-Studio as a SAST tool, the analyzer provides mappings for its warnings to Common Weakness Enumeration, SEI CERT Coding Standards, and also supports MISRA standard (currently in development).

CppCon 2017: Programming with C++ Constraints: Background, Utility, and Gotchas--Walter E. Brown

By Adrien Hamelin | Jul 23, 2018 02:13 PM | Tags: community

Have you registered for CppCon 2018 in September? Registration is open now.

While we wait for this year’s event, we’re featuring videos of some of the 100+ talks from CppCon 2017 for you to enjoy. Here is today’s feature:

Programming with C++ Constraints: Background, Utility, and Gotchas

by Walter E. Brown

(watch on YouTube) (watch on Channel 9)

Summary of the talk:

Compile-time constraints will likely soon become part of our routine C++ programming vocabulary. Why? Such constraints are induced by new core language features (requires-clauses and requires-expressions) that are on the horizon for C++. What are these all about?

Almost every function imposes requirements on its users; violating those requirements typically leads to incorrect programs. Historically, such requirements had to be expressed in comments or other documentation, as there was little machinery to express them in code. Soon we will be able to express more requirements in code, thus allowing compilers to detect and address more violations.

This talk aims to prepare both new and veteran C++ programmers with the necessary background, tutorial information, and advice to exploit this powerful new supplement to function declarations. A case study, illustrating an unexpected gotcha, will conclude the presentation.

Announcing “trivially relocatable”-- Arthur O’Dwyer

By Adrien Hamelin | Jul 23, 2018 02:10 PM | Tags: performance experimental

Do you want this?

Announcing “trivially relocatable”

by Arthur O’Dwyer

From the article:

Frequent users of Compiler Explorer, a.k.a. godbolt.org, may have noticed that a few days ago a new compiler appeared in its dropdown menu. “x86-64 clang (experimental P1144)” is a branch of Clang which I have patched to support the concept of “trivially relocatable types,” as described in my C++Now 2018 talk and as proposed for standardization in my upcoming paper P1144 “Object relocation in terms of move plus destroy” (coauthored with Mingxin Wang)...

How to Construct C++ Objects Without Making Copies--Miguel Raggi

By Adrien Hamelin | Jul 23, 2018 02:05 PM | Tags: performance

Avoiding copies.

How to Construct C++ Objects Without Making Copies

by Miguel Raggi

From the article:

C++ references are a powerful but tricky tool: used correctly, they can improve performance with little impact on the clarity of code. But used badly, they can hide performance issues, or even send a peaceful program into the realm of undefined behaviour.

In this post, we will explore how to use the various references of C++ to minimize copies when constructing an object that holds a value, and how in some cases we can even reach zero copies.

This article assumes that you’re familiar with move semantics, lvalue, rvalue and forwarding references. If you’d like to be refreshed on the subject, you can take a look at lvalues, rvalues and their references.